package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;



    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //判断异常情况
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if(addressBook == null){
            //1.地址簿为空
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收获地址是否超出配送范围
        checkOutOfRange(addressBook.getProvinceName() + addressBook.getCityName() +
                addressBook.getDistrictName() + addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList == null || shoppingCartList.size() == 0){
            //2.购物车为空
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //插入1条订单数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getProvinceName() + addressBook.getCityName() +
                addressBook.getDistrictName() + addressBook.getDetail());

        orderMapper.insert(orders);
        //插入n条订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orders.getId());
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);

        //清空当前用户购物车数据
        shoppingCartMapper.delete(shoppingCart);

        //返回OrderSubmitVO对象
        OrderSubmitVO orderSubmitVO = new OrderSubmitVO();
        orderSubmitVO.setId(orders.getId());
        orderSubmitVO.setOrderNumber(orders.getNumber());
        orderSubmitVO.setOrderAmount(orders.getAmount());
        orderSubmitVO.setOrderTime(orders.getOrderTime());
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过WebSocket实现来单提醒功能
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号" + outTradeNo);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    /**
     * 历史订单分页查询
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(Integer pageNum, Integer pageSize, Integer status) {
        PageHelper.startPage(pageNum,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();
        if(page != null && page.getTotal() > 0){
            for (Orders orders : page) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                Long ordersId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(ordersId);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }

        }

        return new PageResult(page.getTotal(),list);
    }

    /**
     * 查看订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO orderDetail(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //判断当前订单状态
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        //检验订单是否存在
        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Integer status = ordersDB.getStatus();
        if(status > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCartList.add(shoppingCart);
        }
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery4Admin(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        if(page != null && page.getTotal() > 0){
            for (Orders orders : page) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                Long ordersId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(ordersId);
                StringJoiner sj = new StringJoiner(" ; ");
                for (OrderDetail orderDetail : orderDetailList) {
                    String name = orderDetail.getName();
                    Integer number = orderDetail.getNumber();
                    sj.add(name + "*" + number);
                }
                String orderDishes = sj.toString();
                orderVO.setOrderDishes(orderDishes);
                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO getStatistics() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = new Orders();
        orders.setId(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());

        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        if(ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //使用WebSocket向客户端浏览器推送消息
        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号" + ordersDB.getNumber());

        String json = JSON.toJSONString(map);

        webSocketServer.sendToAllClient(json);

    }
}
